by EnergyUnlimited » Wed 14 Jun 2006, 02:24:47
$this->bbcode_second_pass_quote('grabby', '
')The human race is not going to survive by any idea it will ever come up with, it is about ready to run out of power in a few years.
But it won't be starvation that kills all on earth it will be one of three things or all three:
1. Nukes
2. Irreversibly mutating our food supply.
3. Mutated disease that is unstoppable.
Can't say which, but you'll probably see for yourself.
As for space:
We need about 100 miles of air between us and space radiation, no one would survive a trip to any star.
Re. Extinction of humanity due to running out of power.
Unlikely.
1. Nuclear + renewables will replace oil & coal. Within 200-1000 years (means before nuclear will run out), fusion is likely to crop in.
2. In the past we had only burning of wood as a power source (and even earlier no power source other than food at all) and there was no extinction.
Re. Nukes.
Unlikely. They grow smaller & weaker and we have fewer and fewer of them. The radiation is not so bad either (watch this wildlife reserve around Chernobyl and note that majority of those irradiated had no or not much health problems. However there was unlucky few).
Nuclear winter would not starve to death coastal areas either and few years later spring would come.
Re. Mutating food supply.
Mutated food may be healthier than natural one.
Even if we lose few crops (say soya or maize) there is plenty of other to replace those.
I doubt, that all animals could be synchronically mutated somehow.
If things come to crunch you will always have some algi to eat.
Re. Unstoppable disease.
Unlikely.
The disease causing bug will die of once probability of meeting uninfected human by the one who got it is so low, that it will not happen within the lifetime of the latter.
Mean: Bug will go extinct but some healthy people will survive.
That is assuming 100% mortality rate (also unlikely, even from AIDS some individuals recovered).
Re. 100 miles of air needed to survive in space (radiation hazard).
Not at all.
Few inches of lead will do as well.
Nothing at all (except shell of spacecraft) will also do. Some astronauts survived more than a year on the orbit without observable radiation related health problems.
It would take about 15 years for the travel to nearby alien stars assuming 20% of speed of light.
At 95 % of speed of light it would take only few weeks (due to relativistic effects). Not enogh time to irradiate yourself much...
Finally magnetic field generated around spacecraft will deflect energetic charged particles which are major contituents of cosmic radiation.
It is always better to look for solutions than to worry about problems.